Entomostraca from the Scottish Seas. 127 



Antennse not very elongated, moderately stout, inner 

 ramus considerably shorter than the outer (PI. III. fig. 12). 



The mandibles, which somewhat resemble those of the 

 species last described, have a strongly toothed masticatory 

 edge (PI. 11. fig. 11). 



'J'he three inner marginal lobes of the first maxillipeds are 

 each furnished with two apical setaj, coarsely plumose and 

 elongated, and a shorter retlexed seta ; the next two lobes 

 terminate in long slender and slightly curved spines (PI. III. 

 fig. 13). 



The five terminal joints of the second maxillipeds are 

 short and furnished with a number of rather slender bristles 

 (PI. III. fig. 14). 



The swimming-feet are somewhat similar in structure to 

 those of the species previously described. The first pair are 

 moderately stout, but much smaller than the next pair, and 

 the spines on the outer distal angles of the three joints of the 

 outer ramus are not very strong (PI. III. fig. 15). The outer 

 ramus of the second pair is moderately elongate and broadly 

 lamelliform ; the marginal spines are strong, rather long and 

 setiferous, but the apical spine is comparatively short and 

 stout and coarsely serrated on the outer edge (PI. III. fig. 16). 

 The outer rami of the third and fourth pairs are narrower 

 than that of the second, and the marginal spines more 

 slender ; the terminal spine is moderately stout and coarsely 

 serrated on the outer edge, the number of teeth being about 

 eighteen. The integument of the inner branches is covered 

 more or less with minute denticles (PI. 111. fig. 17). 



The fifth pair of feet are small and symmetrical, each 

 consists of a single three-jointed branch; the third joint, 

 "which is rather longer than eitlier of the other two, is pro- 

 duced anteriorly into a moderately long spine and is armed 

 with two other spines, one near the proximal end of the outer 

 margin and the otliers on the outer distal angle (PI. III. 

 fig. 18). The first and second joints are without conspicuous 

 armature. 



Hab. 'Goldseeker' Station 53 (lat. 59° 36' N., long. 

 7° W.), 1140 metres deep, collected in August 1907. One 

 or two specimens only obtained ; no male observed. 



In the same gathering with the species just described were 

 others already known to science, such as Arietellus plumifer^ 

 G. O. tSars, a highly coloured form with densely plumose 

 tail-setaj; Chirundina streetsi, Giesbrecht, described from 

 specimens collected off the west coast of North America in 

 lat. 35° N., long. 125'^ W. ; Candacia norvegica, Boeck ; 

 Gaetanus lutifrons, G. O. Surs ; Meijacalanus loiujicornis 



